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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2017
Earnings Per Share [Abstract]  
Calculation of Basic and Diluted Earnings per Share

The following table sets forth the calculation of basic and diluted earnings per share:

Three Months EndedSix Months Ended
June 30,June 30,
(in thousands, except per share data)2017201620172016
Net income$17,176$12,685$26,863$23,737
Denominator for basic earnings per share -
weighted-average number of common
shares outstanding during the period49,76649,32349,64049,586
Incremental common shares attributable to
exercise of dilutive options318287341289
Incremental common shares attributable
to outstanding restricted stock units15557228167
Denominator for diluted earnings per share50,23949,66750,20950,042
Basic earnings per share$0.35$0.26$0.54$0.48
Diluted earnings per share$0.34$0.26$0.54$0.47